Methionine-isoleucine dichotomy at a key position in scorpion toxins inhibiting voltage-gated potassium channels

AI Kuzmenkov, AM Gigolaev, EL Pinheiro-Junior… - Toxicon, 2023 - Elsevier
Previous studies have identified some key amino acid residues in scorpion toxins blocking
potassium channels. In particular, the most numerous toxins belonging to the α-KTx family …

Beta-KTx14. 3, a scorpion toxin, blocks the human potassium channel KCNQ1

G Titaux-Delgado, AE Lopez-Giraldo, E Carrillo… - … et Biophysica Acta (BBA …, 2023 - Elsevier
Potassium channels play a key role in regulating many physiological processes, thus,
alterations in their proper functioning can lead to the development of several diseases …

Expression of recombinant α-toxin BmKM9 from scorpion Buthus martensii Karsch and its functional characterization on sodium channels

F Yang, S Liu, Y Zhang, C Qin, L Xu, W Li, Z Cao, W Li… - Peptides, 2018 - Elsevier
Scorpion toxins are invaluable pharmacological tools for studying ion channels and
potential drugs for channelopathies. The long-chain toxins from scorpion venom with four …

Disulfide bridge reorganization induced by proline mutations in maurotoxin

E Carlier, Z Fajloun, P Mansuelle, M Fathallah… - FEBS …, 2001 - Wiley Online Library
Maurotoxin (MTX) is a 34‐residue toxin that has been isolated from the venom of the
chactidae scorpion Scorpio maurus palmatus, and characterized. Together with Pi1 and …

[PDF][PDF] Three new toxins from the scorpion Pandinus imperator selectively block certain voltage-gated K+ channels.

RS Rogowski, JH Collins, TJ O'Neill… - Molecular …, 1996 - researchgate.net
Three 35-amino acid peptide K channel toxins (pandinotoxins) were purified from the venom
of the scorpion Pandinus imperaton the toxins are designated pandinotoxin(PiTX)-Ka, PiTX …

[HTML][HTML] κ-Hefutoxin1, a Novel Toxin from the ScorpionHeterometrus fulvipes with Unique Structure and Function: Importance Of The Functional Diad In Potassium …

KN Srinivasan, V Sivaraja, I Huys, T Sasaki… - Journal of Biological …, 2002 - ASBMB
An important and exciting challenge in the postgenomic era is to understand the functions of
newly discovered proteins based on their structures. The main thrust is to find the common …

A new type of scorpion Na+-channel-toxin-like polypeptide active on K+ channels

N Srairi-Abid, JI Guijarro, R Benkhalifa… - Biochemical …, 2005 - portlandpress.com
We have purified and characterized two peptides, named KAaH1 and KAaH2 (AaH
polypeptides 1 and 2 active on K+ channels, where AaH stands for Androctonus australis …

Hemitoxin, the first potassium channel toxin from the venom of the Iranian scorpion Hemiscorpius lepturus

N Srairi‐Abid, D Shahbazzadeh, I Chatti… - The FEBS …, 2008 - Wiley Online Library
Hemitoxin (HTX) is a new K+ channel blocker isolated from the venom of the Iranian
scorpion Hemiscorpius lepturus. It represents only 0.1% of the venom proteins, and …

[HTML][HTML] OcyKTx2, a new K+-channel toxin characterized from the venom of the scorpion Opisthacanthus cayaporum

EF Schwartz, A Bartok, CA Schwartz, F Papp… - Peptides, 2013 - Elsevier
Opisthacanthus cayaporum belongs to the Liochelidae family, and the scorpions from this
genus occur in southern Africa, Central America and South America and, therefore, can be …

Chemical synthesis and 1H‐NMR 3D structure determination of AgTx2‐MTX chimera, a new potential blocker for Kv1.2 channel, derived from MTX and AgTx2 …

C Pimentel, S M'barek, V Visan, S Grissmer… - Protein …, 2008 - Wiley Online Library
Abstract Agitoxin 2 (AgTx2) is a 38‐residue scorpion toxin, cross‐linked by three disulfide
bridges, which acts on voltage‐gated K+ (Kv) channels. Maurotoxin (MTX) is a 34‐residue …